Answer:
B) wash trades
Step-by-step explanation:
In the case when the wash trades are performed so it consists the simultaneous or near-simultaneous i.e. selling and the repurchase of the similar security for the motive of producing the trading activity due to which price rise. This is the form of how the market manipulates. The other options i.e. given in the question is not considered the market manipulation
Therefore the option B is correct